الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::c9fcf7673fb62d81aaed19a9788b10faTesthttps://doi.org/10.1136/hrt.2010.208967.713Test
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::52a67ca108fe4f80c652dc9abcce9688Testhttps://doi.org/10.1136/hrt.2010.208967.567Test